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IEICE TRANSACTIONS on Electronics

Nitrogen Adsorption of Si(100) Surface by Plasma Excited Ammonia

P. Pungboon PANSILA, Kensaku KANOMATA, Bashir AHMMAD, Shigeru KUBOTA, Fumihiko HIROSE

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Summary :

Nitrogen adsorption on thermally cleaned Si(100) surfaces by pure and plasma excited NH3 is investigated by in situ IR absorption spectroscopy and ex-situ X-ray photoelectron spectroscopy with various temperatures from RT (25°C) to 800°C and with a treatment time of 5 min. The nitrogen coverage after the treatment varies according to the treatment temperature for both pure and plasma excited NH3. In case of the pure NH3, the nitrogen coverage is saturated as low as 0.13–0.25 mono layer (ML) while the growth of the nitride film commenced at 550°C. For the plasma excited NH3, the saturation coverage was measured at 0.54 ML at RT and it remained unincreased from RT to 550°C. This indicates that the plasma excited NH3 enhances the nitrogen adsorption near at RT. It is found that main species of N is Si2= NH in case of the plasma excited NH3 at RT while the pure NH3 treatment gives rise to the Si–NH2 passivation with Si–H at RT. We discuss the mechanism of the nitrogen adsorption on Si(100) surfaces with the plasma excited NH3 in comparison with the study on the pure NH3 treatment.

Publication
IEICE TRANSACTIONS on Electronics Vol.E98-C No.5 pp.395-401
Publication Date
2015/05/01
Publicized
Online ISSN
1745-1353
DOI
10.1587/transele.E98.C.395
Type of Manuscript
Special Section PAPER (Special Section on Fundamentals and Applications of Advanced Semiconductor Devices)
Category

Authors

P. Pungboon PANSILA
  Yamagata University
Kensaku KANOMATA
  Yamagata University
Bashir AHMMAD
  Yamagata University
Shigeru KUBOTA
  Yamagata University
Fumihiko HIROSE
  Yamagata University

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